Information Technology Reference
In-Depth Information
auto qos voip trust
service-policy output AutoQoS-Policy-Trust
end
CME_Voice#
show run int s0/1/0
Building configuration...
!
interface Serial0/1/0
bandwidth 512
no ip address
encapsulation ppp
auto qos voip trust
no fair-queue
clock rate 2000000
ppp multilink
ppp multilink group 2001100116
end
The changes to the router interfaces look relatively tame compared to the amount of syn-
tax entered under the switch interfaces; however, what you do not see are the billion other
commands (or perhaps slightly less than a billion) that were entered in other configuration
modes of the router to create class maps, policy maps, multilink interfaces, and so on. The
full explanation of those commands is saved for the CCNP Voice QoS material.
Note:
In Example 6-30, after entering the
auto ?
command under the FastEthernet inter-
face, notice that one of the options you are given is
auto discovery
. This enables a newer,
ultra-incredible version of AutoQoS that allows the router to monitor your network for an
extended time to discover known types of data, voice, and video traffic that are consid-
ered higher priority based on common high-priority application types. After the router
captures enough traffic, it generates QoS policy recommendations that you can choose to
apply or ignore.
Table 6-8 summarizes the different variations of AutoQoS commands you can enter on
Cisco switch and router platforms.
Key
To p i c
Table 6-8
AutoQoS Syntax Variations
Command
Platform
Description
auto qos voip
Router or
Layer 3 switch
Enables AutoQoS without trusting any existing mark-
ings on packets. The router re-marks all traffic types
using access lists or Network-Based Application Recog-
nition (NBAR) to identify traffic (higher processor-
utilization tasks).
